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Finding the Fourth Proportional to 385,993,575.60, 578,990,363.40 and 98,779,239.60

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Solution

The fourth proportional to 385,993,575.60, 578,990,363.40 and 98,779,239.60 is: 148,168,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,993,575.60 : 578,990,363.40 = 98,779,239.60 : x
  2. Step 2: Convert to fraction form
    385,993,575.60/578,990,363.40 = 98,779,239.60/x
  3. Step 3: Cross multiply
    385,993,575.60x = 578,990,363.40 × 98,779,239.60
  4. Step 4: Simplify right side
    385,993,575.60x = 57,192,227,832,379,664
  5. Step 5: Solve for x
    x = 57,192,227,832,379,664/385,993,575.60
  6. Step 6: Final answer
    x = 148,168,859.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.